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The Tour Cycling SIID Triathlon shoes have all the features needed for the triathlete who takes on a time trial after coming out of a swim. The SIDI Air Carbon Vent is made with the Eleven Carbon Composite Sole that is stiff and light. The brushed interior makes these shoes comfortable with no socks on the feet. The shoe is perforated so air and water flows through and your feet dry and stay cool. Finally, the heel loop is large for a quick and easy transition between the legs of a triathlon.